Welcome to the forum, feel free to ask questions here.
Are objects missing from the scene? If not, then maybe exporting to a new scene might help. Or you can try using the temp scene Maya saved when it crashed.
Don't know if it's different in Windows 8+ but in Win 7 it's C:\Users\Name\AppData\Local\Temp The file will have your username.yearMonthDay.hourMinute naming convention.
getenv "TEMP";